| 青海达布逊湖50万年以来气候变化的孢粉学证据 |
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| 引用本文： | 江德昕,杨惠秋.青海达布逊湖50万年以来气候变化的孢粉学证据[J].沉积学报,2001,19(1):101-106. |
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| 作者姓名： | 江德昕 杨惠秋 |
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| 作者单位： | 中国科学院兰州地质研究所 兰州 730000 |
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| 基金项目： | 中国科学院兰州地质研究所所长基金资助项目! (编号 :E97 0 7 0 1 ) |
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| 摘 要： | 基于青海柴达木盆地达布逊湖达 1井岩芯样品孢粉分析结果,将孢粉谱划分为Q2 、Q3 和Q4 三个孢粉带;并根据孢粉组合特征讨论了过去 5 0万年中研究区植被演化和古气候变化问题。达 1井沉积剖面年龄根据古地磁测定。研究结果表明,柴达木盆地中更新世中、晚期 ( 5 0 0～ 130kaBP)气候可能为暖温带半潮湿型,晚更新世 ( 130～ 10kaBP)气候为温带半干燥型,全新世 ( 10～ 0kaBP)气候为寒温带干燥型。晚更新世气候变化与青藏高原古里雅冰芯所记录的冷暖事件演变基本一致.
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| 关 键 词： | 孢粉植物群 古气候 古地磁年龄 第四纪 柴达木盆地 |
| 文章编号： | 1000-0550(2001)01-0101-06 |
| 收稿时间： | 2000-04-04 |
| 修稿时间： | 2000年4月4日 |
Palynological Evidence for Climatic Changes in Dabuxun Lake of Qinghai Province during the Past 500,000 Years |
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| Jiang De-xin,YANG Hui-qiu.Palynological Evidence for Climatic Changes in Dabuxun Lake of Qinghai Province during the Past 500,000 Years[J].Acta Sedimentologica Sinica,2001,19(1):101-106. |
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| Authors: | Jiang De-xin YANG Hui-qiu |
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| Institution: | Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou 730000 |
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| Abstract: | Based on the sporo-pollen analyses of the core samples of Cor ehole D-1 from the Dabuxun Lake in the Qaidam Basin of the Qinghai Province, the spo ro-pollen diagram may be divided into three palynofloral zones, I.e. Zone Q2, Zone Q3, and Zone Q4. In accordance with the characteristics of the palynofl oras, the problems on the vegetational evolution and the paleoclimatic changes in the past 500 ka were discussed. Ages of the sedimentary section of Corehole D-1 are based on paleomagnetic dating. The results of this study indicate that the middle to late Middle Pleistocene (500～130 ka BP) paleoclimate might be a semi-wet type of the warm -temperate zone, the Late Pleistocene (130～10 ka BP) paleoclimate might be a semi-arid type of the temperate zone, and the Holocene (10～0 ka BP) paleoclim ate might be a arid type of the cool-temperate zone in the Qaidam Basin. The Late Pleistocene climatic changes coincide essentially with the evolution of cool and warm events recorded by the Guliya ice core from the Qinghai-Tibetan Plateau. |
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| Keywords: | palynoflora paleoclimate paleomagnetic age Quaternary Qaidam Basin |
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